hi-ucs/front/public/leaflet/libs/iclient8c/examples/js/layer/Google.js

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2022-06-14 09:32:49 +08:00
/**
* @requires SuperMap/Layer/SphericalMercator.js
* @requires SuperMap/Layer/EventPane.js
* @requires SuperMap/Layer/FixedZoomLevels.js
* @requires SuperMap/Lang.js
*/
/**
* Class: SuperMap.Layer.Google
* Google图层类
*
* Inherits from:
* - <SuperMap.Layer.SphericalMercator>
* - <SuperMap.Layer.EventPane>
* - <SuperMap.Layer.FixedZoomLevels>
*/
SuperMap.Layer.Google = SuperMap.Class(
SuperMap.Layer.EventPane,
SuperMap.Layer.FixedZoomLevels, {
/**
* Constant: MIN_ZOOM_LEVEL
* {Integer} 最小缩放等级为0
*/
MIN_ZOOM_LEVEL: 0,
/**
* Constant: MAX_ZOOM_LEVEL
* {Integer} 最大缩放等级为21
*/
MAX_ZOOM_LEVEL: 21,
/**
* Constant: RESOLUTIONS
* {Array(Float)} 分辨率数组
* 分辨率数组值为固定值这样会更接近wms的标准投影
*/
RESOLUTIONS: [
1.40625,
0.703125,
0.3515625,
0.17578125,
0.087890625,
0.0439453125,
0.02197265625,
0.010986328125,
0.0054931640625,
0.00274658203125,
0.001373291015625,
0.0006866455078125,
0.00034332275390625,
0.000171661376953125,
0.0000858306884765625,
0.00004291534423828125,
0.00002145767211914062,
0.00001072883605957031,
0.00000536441802978515,
0.00000268220901489257,
0.0000013411045074462891,
0.00000067055225372314453
],
/**
* APIProperty: type
* {GMapType} 指定需要获取的图层类型默认值为unll表示图层为G_STREETS_MAP
* Google服务提供的图层类型有PHYSICALHYBRIDSATELLITESTREETS
*/
type: null,
/**
* APIProperty: wrapDateLine
* {Boolean} 允许水平方向调整默认为true
* <sphericalMercator>为true时设置此项为false可以限制水平方向调整
*/
wrapDateLine: true,
/**
* APIProperty: sphericalMercator
* {Boolean} 是否使用墨卡托投影默认值为false
* 如果使用墨卡托投影将会导致所有与地图的互动实际上是与地图投影的互动其支持矢量绘图地图叠加等
*/
sphericalMercator: false,
/**
* Property: version
* {Number} The version of the Google Maps API
*/
version: null,
/**
* Constructor: SuperMap.Layer.Google
* Google图层构造函数
*
* Example
* (code)
*
* var googlelayer = new SuperMap.Layer.Google( "Google Physical",
* {type: google.maps.MapTypeId.TERRAIN});
*
* (end)
*
* Parameters:
* name - {String} 图层名称.
* options - {Object} 一个options对象该对象上的属性将会被设置到图层上
*/
initialize: function(name, options) {
options = options || {};
if(!options.version) {
options.version = typeof GMap2 === "function" ? "2" : "3";
}
var mixin = SuperMap.Layer.Google["v" +
options.version.replace(/\./g, "_")];
if (mixin) {
SuperMap.Util.applyDefaults(options, mixin);
} else {
throw "Unsupported Google Maps API version: " + options.version;
}
SuperMap.Util.applyDefaults(options, mixin.DEFAULTS);
if (options.maxExtent) {
options.maxExtent = options.maxExtent.clone();
}
SuperMap.Layer.EventPane.prototype.initialize.apply(this,
[name, options]);
SuperMap.Layer.FixedZoomLevels.prototype.initialize.apply(this,
[name, options]);
if (this.sphericalMercator) {
SuperMap.Util.extend(this, SuperMap.Layer.SphericalMercator);
this.initMercatorParameters();
}
},
/**
* Method: clone
* 创建一个该图层的副本
*
* Returns:
* {<SuperMap.Layer.Google>} An exact clone of this layer
*/
clone: function() {
/**
* This method isn't intended to be called by a subclass and it
* doesn't call the same method on the superclass. We don't call
* the super's clone because we don't want properties that are set
* on this layer after initialize (i.e. this.mapObject etc.).
*/
return new SuperMap.Layer.Google(
this.name, this.getOptions()
);
},
/**
* APIMethod: setVisibility
* 为图层设置可见性标记相应的显示/隐藏及重绘触发事件除非其他规定
*
* 注意此visibility不再简单的是否为图层的styledisplay被设置为block现在我们在图层类上存储一个visibility状态属性
* 这样可以使我们记录是否要求一个图层存在可见性属性当地图的分辨率在图层的范围之外的状况下这个属性可能会被推翻
*
* Parameters:
* visible - {Boolean} 显示图层 (在范围内)
*/
setVisibility: function(visible) {
// sharing a map container, opacity has to be set per layer
var opacity = this.opacity == null ? 1 : this.opacity;
SuperMap.Layer.EventPane.prototype.setVisibility.apply(this, arguments);
this.setOpacity(opacity);
},
/**
* APIMethod: display
* 显示或隐藏图层
*
* Parameters:
* display - {Boolean}
*/
display: function(visible) {
if (!this._dragging) {
this.setGMapVisibility(visible);
}
SuperMap.Layer.EventPane.prototype.display.apply(this, arguments);
},
/**
* Method: moveTo
* 移动
* Parameters:
* bound - {<SuperMap.Bounds>}
* zoomChanged - {Boolean} 说明何时zoom开始变化当图层必须做一些初始化工作的时候
* dragging - {Boolean}
*/
moveTo: function(bounds, zoomChanged, dragging) {
this._dragging = dragging;
SuperMap.Layer.EventPane.prototype.moveTo.apply(this, arguments);
delete this._dragging;
},
/**
* APIMethod: setOpacity
* 为全部图层设置不透明度
*
* Parameter:
* opacity - {Float}
*/
setOpacity: function(opacity) {
if (opacity !== this.opacity) {
if (this.map != null) {
this.map.events.triggerEvent("changelayer", {
layer: this,
property: "opacity"
});
}
this.opacity = opacity;
}
// Though this layer's opacity may not change, we're sharing a container
// and need to update the opacity for the entire container.
if (this.getVisibility()) {
var container = this.getMapContainer();
SuperMap.Util.modifyDOMElement(
container, null, null, null, null, null, null, opacity
);
}
},
/**
* APIMethod: destroy
* 清理此图层.
*/
destroy: function() {
/**
* We have to override this method because the event pane destroy
* deletes the mapObject reference before removing this layer from
* the map.
*/
if (this.map) {
this.setGMapVisibility(false);
var cache = SuperMap.Layer.Google.cache[this.map.id];
if (cache && cache.count <= 1) {
this.removeGMapElements();
}
}
SuperMap.Layer.EventPane.prototype.destroy.apply(this, arguments);
},
/**
* Method: removeGMapElements
* Remove all elements added to the dom. This should only be called if
* this is the last of the Google layers for the given map.
*/
removeGMapElements: function() {
var cache = SuperMap.Layer.Google.cache[this.map.id];
if (cache) {
// remove shared elements from dom
var container = this.mapObject && this.getMapContainer();
if (container && container.parentNode) {
container.parentNode.removeChild(container);
}
var termsOfUse = cache.termsOfUse;
if (termsOfUse && termsOfUse.parentNode) {
termsOfUse.parentNode.removeChild(termsOfUse);
}
var poweredBy = cache.poweredBy;
if (poweredBy && poweredBy.parentNode) {
poweredBy.parentNode.removeChild(poweredBy);
}
}
},
/**
* APIMethod: removeMap
* On being removed from the map, also remove termsOfUse and poweredBy divs
*
* Parameters:
* map - {<SuperMap.Map>}
*/
removeMap: function(map) {
// hide layer before removing
if (this.visibility && this.mapObject) {
this.setGMapVisibility(false);
}
// check to see if last Google layer in this map
var cache = SuperMap.Layer.Google.cache[map.id];
if (cache) {
if (cache.count <= 1) {
this.removeGMapElements();
delete SuperMap.Layer.Google.cache[map.id];
} else {
// decrement the layer count
--cache.count;
}
}
// remove references to gmap elements
delete this.termsOfUse;
delete this.poweredBy;
delete this.mapObject;
delete this.dragObject;
SuperMap.Layer.EventPane.prototype.removeMap.apply(this, arguments);
},
//
// TRANSLATION: MapObject Bounds <-> SuperMap.Bounds
//
/**
* APIMethod: getOLBoundsFromMapObjectBounds
*
* Parameters:
* moBounds - {Object}
*
* Returns:
* {<SuperMap.Bounds>} An <SuperMap.Bounds>, translated from the
* passed-in MapObject Bounds.
* Returns null if null value is passed in.
*/
getOLBoundsFromMapObjectBounds: function(moBounds) {
var olBounds = null;
if (moBounds != null) {
var sw = moBounds.getSouthWest();
var ne = moBounds.getNorthEast();
if (this.sphericalMercator) {
sw = this.forwardMercator(sw.lng(), sw.lat());
ne = this.forwardMercator(ne.lng(), ne.lat());
} else {
sw = new SuperMap.LonLat(sw.lng(), sw.lat());
ne = new SuperMap.LonLat(ne.lng(), ne.lat());
}
olBounds = new SuperMap.Bounds(sw.lon,
sw.lat,
ne.lon,
ne.lat );
}
return olBounds;
},
/**
* APIMethod: getWarningHTML
*
* Returns:
* {String} String with information on why layer is broken, how to get
* it working.
*/
getWarningHTML:function() {
return SuperMap.i18n("googleWarning");
},
/************************************
* *
* MapObject Interface Controls *
* *
************************************/
// Get&Set Center, Zoom
/**
* APIMethod: getMapObjectCenter
*
* Returns:
* {Object} The mapObject's current center in Map Object format
*/
getMapObjectCenter: function() {
return this.mapObject.getCenter();
},
/**
* APIMethod: getMapObjectZoom
*
* Returns:
* {Integer} The mapObject's current zoom, in Map Object format
*/
getMapObjectZoom: function() {
return this.mapObject.getZoom();
},
/************************************
* *
* MapObject Primitives *
* *
************************************/
// LonLat
/**
* APIMethod: getLongitudeFromMapObjectLonLat
*
* Parameters:
* moLonLat - {Object} MapObject LonLat format
*
* Returns:
* {Float} Longitude of the given MapObject LonLat
*/
getLongitudeFromMapObjectLonLat: function(moLonLat) {
return this.sphericalMercator ?
this.forwardMercator(moLonLat.lng(), moLonLat.lat()).lon :
moLonLat.lng();
},
/**
* APIMethod: getLatitudeFromMapObjectLonLat
*
* Parameters:
* moLonLat - {Object} MapObject LonLat format
*
* Returns:
* {Float} Latitude of the given MapObject LonLat
*/
getLatitudeFromMapObjectLonLat: function(moLonLat) {
var lat = this.sphericalMercator ?
this.forwardMercator(moLonLat.lng(), moLonLat.lat()).lat :
moLonLat.lat();
return lat;
},
// Pixel
/**
* APIMethod: getXFromMapObjectPixel
*
* Parameters:
* moPixel - {Object} MapObject Pixel format
*
* Returns:
* {Integer} X value of the MapObject Pixel
*/
getXFromMapObjectPixel: function(moPixel) {
return moPixel.x;
},
/**
* APIMethod: getYFromMapObjectPixel
*
* Parameters:
* moPixel - {Object} MapObject Pixel format
*
* Returns:
* {Integer} Y value of the MapObject Pixel
*/
getYFromMapObjectPixel: function(moPixel) {
return moPixel.y;
},
CLASS_NAME: "SuperMap.Layer.Google"
});
/**
* Property: SuperMap.Layer.Google.cache
* {Object} Cache for elements that should only be created once per map.
*/
SuperMap.Layer.Google.cache = {};
/**
* Constant: SuperMap.Layer.Google.v2
*
* Mixin providing functionality specific to the Google Maps API v2.
*/
SuperMap.Layer.Google.v2 = {
/**
* Property: termsOfUse
* {DOMElement} Div for Google's copyright and terms of use link
*/
termsOfUse: null,
/**
* Property: poweredBy
* {DOMElement} Div for Google's powered by logo and link
*/
poweredBy: null,
/**
* Property: dragObject
* {GDraggableObject} Since 2.93, Google has exposed the ability to get
* the maps GDraggableObject. We can now use this for smooth panning
*/
dragObject: null,
/**
* Method: loadMapObject
* Load the GMap and register appropriate event listeners. If we can't
* load GMap2, then display a warning message.
*/
loadMapObject:function() {
if (!this.type) {
this.type = G_NORMAL_MAP;
}
var mapObject, termsOfUse, poweredBy;
var cache = SuperMap.Layer.Google.cache[this.map.id];
if (cache) {
// there are already Google layers added to this map
mapObject = cache.mapObject;
termsOfUse = cache.termsOfUse;
poweredBy = cache.poweredBy;
// increment the layer count
++cache.count;
} else {
// this is the first Google layer for this map
var container = this.map.viewPortDiv;
var div = document.createElement("div");
div.id = this.map.id + "_GMap2Container";
div.style.position = "absolute";
div.style.width = "100%";
div.style.height = "100%";
container.appendChild(div);
// create GMap and shuffle elements
try {
mapObject = new GMap2(div);
// move the ToS and branding stuff up to the container div
termsOfUse = div.lastChild;
container.appendChild(termsOfUse);
termsOfUse.style.zIndex = "1100";
termsOfUse.style.right = "";
termsOfUse.style.bottom = "";
termsOfUse.className = "olLayerGoogleCopyright";
poweredBy = div.lastChild;
container.appendChild(poweredBy);
poweredBy.style.zIndex = "1100";
poweredBy.style.right = "";
poweredBy.style.bottom = "";
poweredBy.className = "olLayerGooglePoweredBy gmnoprint";
} catch (e) {
throw(e);
}
// cache elements for use by any other google layers added to
// this same map
SuperMap.Layer.Google.cache[this.map.id] = {
mapObject: mapObject,
termsOfUse: termsOfUse,
poweredBy: poweredBy,
count: 1
};
}
this.mapObject = mapObject;
this.termsOfUse = termsOfUse;
this.poweredBy = poweredBy;
// ensure this layer type is one of the mapObject types
if (SuperMap.Util.indexOf(this.mapObject.getMapTypes(),
this.type) === -1) {
this.mapObject.addMapType(this.type);
}
//since v 2.93 getDragObject is now available.
if(typeof mapObject.getDragObject == "function") {
this.dragObject = mapObject.getDragObject();
} else {
this.dragPanMapObject = null;
}
if(this.isBaseLayer === false) {
this.setGMapVisibility(this.div.style.display !== "none");
}
},
/**
* APIMethod: onMapResize
*/
onMapResize: function() {
// workaround for resizing of invisible or not yet fully loaded layers
// where GMap2.checkResize() does not work. We need to load the GMap
// for the old div size, then checkResize(), and then call
// layer.moveTo() to trigger GMap.setCenter() (which will finish
// the GMap initialization).
if(this.visibility && this.mapObject.isLoaded()) {
this.mapObject.checkResize();
} else {
if(!this._resized) {
var layer = this;
var handle = GEvent.addListener(this.mapObject, "load", function() {
GEvent.removeListener(handle);
delete layer._resized;
layer.mapObject.checkResize();
layer.moveTo(layer.map.getCenter(), layer.map.getZoom());
});
}
this._resized = true;
}
},
/**
* Method: setGMapVisibility
* Display the GMap container and associated elements.
*
* Parameters:
* visible - {Boolean} Display the GMap elements.
*/
setGMapVisibility: function(visible) {
var cache = SuperMap.Layer.Google.cache[this.map.id];
if (cache) {
var container = this.mapObject.getContainer();
if (visible === true) {
this.mapObject.setMapType(this.type);
container.style.display = "";
this.termsOfUse.style.left = "";
this.termsOfUse.style.display = "";
this.poweredBy.style.display = "";
cache.displayed = this.id;
} else {
if (cache.displayed === this.id) {
delete cache.displayed;
}
if (!cache.displayed) {
container.style.display = "none";
this.termsOfUse.style.display = "none";
// move ToU far to the left in addition to setting display
// to "none", because at the end of the GMap2 load
// sequence, display: none will be unset and ToU would be
// visible after loading a map with a google layer that is
// initially hidden.
this.termsOfUse.style.left = "-9999px";
this.poweredBy.style.display = "none";
}
}
}
},
/**
* Method: getMapContainer
*
* Returns:
* {DOMElement} the GMap container's div
*/
getMapContainer: function() {
return this.mapObject.getContainer();
},
//
// TRANSLATION: MapObject Bounds <-> SuperMap.Bounds
//
/**
* APIMethod: getMapObjectBoundsFromOLBounds
*
* Parameters:
* olBounds - {<SuperMap.Bounds>}
*
* Returns:
* {Object} A MapObject Bounds, translated from olBounds
* Returns null if null value is passed in
*/
getMapObjectBoundsFromOLBounds: function(olBounds) {
var moBounds = null;
if (olBounds != null) {
var sw = this.sphericalMercator ?
this.inverseMercator(olBounds.bottom, olBounds.left) :
new SuperMap.LonLat(olBounds.bottom, olBounds.left);
var ne = this.sphericalMercator ?
this.inverseMercator(olBounds.top, olBounds.right) :
new SuperMap.LonLat(olBounds.top, olBounds.right);
moBounds = new GLatLngBounds(new GLatLng(sw.lat, sw.lon),
new GLatLng(ne.lat, ne.lon));
}
return moBounds;
},
/************************************
* *
* MapObject Interface Controls *
* *
************************************/
// Get&Set Center, Zoom
/**
* APIMethod: setMapObjectCenter
* Set the mapObject to the specified center and zoom
*
* Parameters:
* center - {Object} MapObject LonLat format
* zoom - {int} MapObject zoom format
*/
setMapObjectCenter: function(center, zoom) {
this.mapObject.setCenter(center, zoom);
},
/**
* APIMethod: dragPanMapObject
*
* Parameters:
* dX - {Integer}
* dY - {Integer}
*/
dragPanMapObject: function(dX, dY) {
this.dragObject.moveBy(new GSize(-dX, dY));
},
// LonLat - Pixel Translation
/**
* APIMethod: getMapObjectLonLatFromMapObjectPixel
*
* Parameters:
* moPixel - {Object} MapObject Pixel format
*
* Returns:
* {Object} MapObject LonLat translated from MapObject Pixel
*/
getMapObjectLonLatFromMapObjectPixel: function(moPixel) {
return this.mapObject.fromContainerPixelToLatLng(moPixel);
},
/**
* APIMethod: getMapObjectPixelFromMapObjectLonLat
*
* Parameters:
* moLonLat - {Object} MapObject LonLat format
*
* Returns:
* {Object} MapObject Pixel transtlated from MapObject LonLat
*/
getMapObjectPixelFromMapObjectLonLat: function(moLonLat) {
return this.mapObject.fromLatLngToContainerPixel(moLonLat);
},
// Bounds
/**
* APIMethod: getMapObjectZoomFromMapObjectBounds
*
* Parameters:
* moBounds - {Object} MapObject Bounds format
*
* Returns:
* {Object} MapObject Zoom for specified MapObject Bounds
*/
getMapObjectZoomFromMapObjectBounds: function(moBounds) {
return this.mapObject.getBoundsZoomLevel(moBounds);
},
/************************************
* *
* MapObject Primitives *
* *
************************************/
// LonLat
/**
* APIMethod: getMapObjectLonLatFromLonLat
*
* Parameters:
* lon - {Float}
* lat - {Float}
*
* Returns:
* {Object} MapObject LonLat built from lon and lat params
*/
getMapObjectLonLatFromLonLat: function(lon, lat) {
var gLatLng;
if(this.sphericalMercator) {
var lonlat = this.inverseMercator(lon, lat);
gLatLng = new GLatLng(lonlat.lat, lonlat.lon);
} else {
gLatLng = new GLatLng(lat, lon);
}
return gLatLng;
},
// Pixel
/**
* APIMethod: getMapObjectPixelFromXY
*
* Parameters:
* x - {Integer}
* y - {Integer}
*
* Returns:
* {Object} MapObject Pixel from x and y parameters
*/
getMapObjectPixelFromXY: function(x, y) {
return new GPoint(x, y);
}
};